Heat exchanger



J. KARMAZIN HEAT EXCHANGER' June 3, 1930.

Filed March 51, 1927 amawntoz Job Mfii jq mgflzzzl/ Chicane-1 c Patented June 3,' 1930 PATENT OFFI E JOHN xARMAzm, or im'rnoir, MICHIGAN HEAT EXCHANGER Application filed March 31, 1927. Serial No. 179,785.

This invention relates to the construction of heat exchange devices, such for example as radiators adapted for the heating of rooms or buildings.

6' One object of my invention is to provide a heat exchange unit of the type mentioned in which steam or other heated fluid may pass through a number of tubular conduits whose walls are integral with extending fins or vanes, providing a greatly enlarged radiat-' ing surface in intimate contact with the heated fluid.

A further object of my invention is to construct a heat exchange device of this type than cast metal. 4

A further object of my invention is to construct a heat exchangedevice of this type from a plurality of elements having integral tubular projections, tapered in varying degree, the projections of each element nesting within those of an adjacent element to form continuous tubes, to permit the tubes to be curved throughout their lengths or a portion thereof.

A further object of my invention is to construct a radiator of a minimum weight, and of arcuate or circular form, adapted for use in conjunction with .a fan or blower.

A further object of my invention is to so form the radiator elements that when properly nested together the structure naturally assumes an arcuate shape. iVith'these and other objects in view my invention consists in the novel combinations and arrangements of parts, a representative embodiment of which is shown in the accompanying drawings and will be more fully described hereinafter.

In the drawings:

Fig. 1 is a plan view of one form of radiator embodying my invention.

Fig. 2 is'a fragmentary sectional elevation, substantially on the line 22 of Fig. 1.

Fig. 3 is a side elevation, partly in section, showing the use ofa heat exchange unit embodying my invention in conjunction with a fan or blower.

Fig. 4 is an enlarged transverse detail section.

wholly or chiefly of drawn sheet metal, rather The heat radiating section of the device is built up of a number of elements, each of which comprises a plate having formed thereon aplurality of transversely extending tapering tubular projections 6. These projections are preferably so formed as to be of substantially the same thickness as the plate itself, rather than drawn to a'reduced'thickness, and they may be conveniently arranged in two or more rows, lengthwise of the sheet.

Said elements are assembled with the proections of one element telescoping into the projections of the adjacent element to form continuous tubes, and are firmly pressedtogether to insure tight joints. The joints may be further secured by solder, which may be applied in a variety of ways, such as dipping.

the ends of the tube elements insolder prior to assembly, applying comniinuted solder and a flux to the tube sections before or during assembly, or dipping the assembled structure. The heat exchange units shown in the drawings are of arcuate cross section, an arcuate or circular configuration being desirable for some purposes. The arcuate shape is secured by assembling in a properly shaped jig or form, and its production maybe facilitated by forming the tube sections which make up the shorter arc with a slightly greater taper than those which make up the longer are. The tube sections of the greater taper will obviously telescope to a greater extent under the same pressure, and a unit of any desired curvature is thus readily secured.

The tubes of the heat exchange sections thus formed communicate with an intake header 7 and an outlet header 9, connecting with a source of fluid supply through pipes 10 and 11. As illustrated in Fig. 1, the com plete heat exchange device comprises two substantially semi-circular branches or units, the

. whole forming a substantially circular annulus. When the device is intended to stand upright a suitable pedestal base 12 may be provided. I A heat exchange unit of this construction is admirably adapted for use in conjunction with a fan or blower. A typical construction of this character is illustrated in Fig. 3.

A sirocco wheel 14 is directly connected to a are secured,

motor, and the circular-heat exchange device" tact with the air and a very high efiiciency The operation of the device may summarized as follows: Heated water, steam or other 'fluid isintroduced into the header 7 through the intake pipe 10 and passes through the tubes of the two radiating units toward the outlet-header 9.- Heat is very rapidly ab sorbed by the Walls of the, sheet .metal' tubes and is in part radiated directly by the tubes, and in part conducted to the plates 5, to be radiated from them. Thetube' sections being integral with the plates, a very rapid conduction of heatto the plates is effected. Moreover, the. structure being of sheet metal rather than cast metal radiation ismuch more rapid, and'a far greater amount of radiation in proportion to the weight is secured.

The embodiments of my inventlon"whi ch have been shown and described are to be considered as illustrative rather than restrictive,

thejinvention being limited only bya broad interpretation of the appended claims.

'W'h'at I .claim as my invention is: 2

1. A heat exchangedevice .for room or building heating: comprising a plurality'of plate elements having integral tapering tuular projections extending transversely therefrom and assembled with the tubular projections of adjacent element s-in telescop mg relation, some of said projections extending'fur'ther into the adjoining projections than others to givean arcuate form-.- j

2. A heat exchange device-for. room or building heating comprising a plurality of substantially 'fia't plate elements of sheet metalhaving a plurality of rows of integral taperingtubular projections extending transversely therefrom, assembled with tubular projections of adjacent elements in telescopmg arrangement'and arcuate in shape, and a fan within said-device for displacing the air parallel to said plate elements. i I t '3. A heatexchange device comprising a plurality of radially disposed plates, each plate having integral therewith a plurality of transversely extending-tapering tubular projections, the projections of each plate telescoping with theproje ctions of adjacent plates to form; circular continuous tubes.

.5] A heat transferring: device comprising a fan and an annular heat exchange member disposed about said fan, and comprising a plurality of radially disposed plates, each plate having integral therewith "a plurality of transversely extending-tapering tubular.

projections, the projections of each plate telescoping with the projections of adjacent .plates', to form continuous tubes, and the projections of. each plate being arranged in in-,, nerand outer'rows, the pro ections in the inner row 'bei'ng tapered and telescoped slight- 1y more than the projections in the outer row,

to give the heat exchange member its annular form.

building heating, a plate element having tapering tubular projections extending transversely therefrom, some of said projections forth. a

7. A heat exchange device forroom or- G In a heat exchangedevice for room or 9d tapering more than others for the purpose set buildingfl-hea-ting comprising a pair of .branches'placed side by side, andheaders for uniting theadjacent" ends of said branches,

'eachof said branches comprising plate elements with tapering tubular projections exv tending transversely therefrom and .assembled with the tubular projections be said elemerits in telescopic relation, some of said proectlons extending farther into adjgining projections than oth'ers. In testimony whereof I have affixed my s1 gnature to; this specification.

JOHN KARMAZIN.

plurality otplates' each havingr'i' a. plurality of,tapering tubular projections extending transversely therefrom and assembled'with the projections of each platein telescoping relation with the projections of adjacent plates, said projections being arranged: in

rows longitudinally of said plates, the projections in the rows toward one edgeof'each plate tapering more than the projections toward the oppositeedge, whereby the assembled structure is given an arcuate shape.

4. A heat transferring device comprising a fan and an annular heat exchange member,

disposed about said fanand comprising-a 

